C++ ACPI_STRNCPY函数代码示例

static void
AeInitializeTableHeader (
    ACPI_TABLE_HEADER       *Header,
    char                    *Signature,
    UINT32                  Length)
{

    ACPI_MOVE_NAME (Header->Signature, Signature);
    Header->Length = Length;

    Header->OemRevision = 0x1001;
    ACPI_STRNCPY (Header->OemId, "Intel", ACPI_OEM_ID_SIZE);
    ACPI_STRNCPY (Header->OemTableId, "AcpiExec", ACPI_OEM_TABLE_ID_SIZE);
    ACPI_STRNCPY (Header->AslCompilerId, "INTL", ACPI_NAME_SIZE);
    Header->AslCompilerRevision = 0x20131218;
}

/******************************************************************************
 *
 * FUNCTION:    acpi_get_name
 *
 * PARAMETERS:  Handle          - Handle to be converted to a pathname
 *              name_type       - Full pathname or single segment
 *              Buffer          - Buffer for returned path
 *
 * RETURN:      Pointer to a string containing the fully qualified Name.
 *
 * DESCRIPTION: This routine returns the fully qualified name associated with
 *              the Handle parameter.  This and the acpi_pathname_to_handle are
 *              complementary functions.
 *
 ******************************************************************************/
acpi_status
acpi_get_name(acpi_handle handle, u32 name_type, struct acpi_buffer * buffer)
{
	acpi_status status;
	struct acpi_namespace_node *node;

	/* Parameter validation */

	if (name_type > ACPI_NAME_TYPE_MAX) {
		return (AE_BAD_PARAMETER);
	}

	status = acpi_ut_validate_buffer(buffer);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	if (name_type == ACPI_FULL_PATHNAME) {

		/* Get the full pathname (From the namespace root) */

		status = acpi_ns_handle_to_pathname(handle, buffer);
		return (status);
	}

	/*
	 * Wants the single segment ACPI name.
	 * Validate handle and convert to a namespace Node
	 */
	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	node = acpi_ns_map_handle_to_node(handle);
	if (!node) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	/* Validate/Allocate/Clear caller buffer */

	status = acpi_ut_initialize_buffer(buffer, ACPI_PATH_SEGMENT_LENGTH);
	if (ACPI_FAILURE(status)) {
		goto unlock_and_exit;
	}

	/* Just copy the ACPI name from the Node and zero terminate it */

	ACPI_STRNCPY(buffer->pointer, acpi_ut_get_node_name(node),
		     ACPI_NAME_SIZE);
	((char *)buffer->pointer)[ACPI_NAME_SIZE] = 0;
	status = AE_OK;

      unlock_and_exit:

	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	return (status);
}

ACPI_STATUS
AcpiOsActualTableOverride (
    ACPI_TABLE_HEADER       *ExistingTable,
    ACPI_TABLE_HEADER       **NewTable)
{
#ifndef ACPI_EXEC_APP
    char                    TableName[ACPI_NAME_SIZE + 1];
#endif


    if (!ExistingTable || !NewTable)
    {
        return (AE_BAD_PARAMETER);
    }

    *NewTable = NULL;


#ifdef ACPI_EXEC_APP

    /* This code exercises the table override mechanism in the core */

#ifdef OBSOLETE_CODE
    if (ACPI_COMPARE_NAME (ExistingTable->Signature, ACPI_SIG_DSDT))
    {
        /* override DSDT with itself */

        *NewTable = AcpiGbl_DbTablePtr;
    }
#endif


#else

    /* Construct a null-terminated string from table signature */

    TableName[ACPI_NAME_SIZE] = 0;
    ACPI_STRNCPY (TableName, ExistingTable->Signature, ACPI_NAME_SIZE);

    *NewTable = OsGetTable (TableName);
    if (*NewTable)
    {
        AcpiOsPrintf ("%s obtained from registry, %d bytes\n",
            TableName, (*NewTable)->Length);
    }
    else
    {
        AcpiOsPrintf ("Could not read %s from registry\n", TableName);
    }
#endif

    return (AE_OK);
}

void acpi_ps_init_op(union acpi_parse_object *op, u16 opcode)
{
	ACPI_FUNCTION_ENTRY();

	op->common.descriptor_type = ACPI_DESC_TYPE_PARSER;
	op->common.aml_opcode = opcode;

	ACPI_DISASM_ONLY_MEMBERS(ACPI_STRNCPY(op->common.aml_op_name,
					      (acpi_ps_get_opcode_info
					       (opcode))->name,
					      sizeof(op->common.aml_op_name)));
}

void
AcpiPsInitOp (
    ACPI_PARSE_OBJECT       *Op,
    UINT16                  Opcode)
{
    ACPI_FUNCTION_ENTRY ();


    Op->Common.DescriptorType = ACPI_DESC_TYPE_PARSER;
    Op->Common.AmlOpcode = Opcode;

    ACPI_DISASM_ONLY_MEMBERS (ACPI_STRNCPY (Op->Common.AmlOpName,
            (AcpiPsGetOpcodeInfo (Opcode))->Name,
                sizeof (Op->Common.AmlOpName)));
}

ACPI_STATUS
AcpiOsTableOverride (
    ACPI_TABLE_HEADER       *ExistingTable,
    ACPI_TABLE_HEADER       **NewTable)
{

    if (!ExistingTable || !NewTable)
    {
        return (AE_BAD_PARAMETER);
    }

    *NewTable = NULL;


#ifdef ACPI_EXEC_APP

    /* Call back up to AcpiExec */

    AeTableOverride (ExistingTable, NewTable);
#endif


#ifdef ACPI_ASL_COMPILER

    /* Attempt to get the table from the registry */

    /* Construct a null-terminated string from table signature */

    TableName[ACPI_NAME_SIZE] = 0;
    ACPI_STRNCPY (TableName, ExistingTable->Signature, ACPI_NAME_SIZE);

    *NewTable = OsGetTable (TableName);
    if (*NewTable)
    {
        AcpiOsPrintf ("Table [%s] obtained from registry, %u bytes\n",
            TableName, (*NewTable)->Length);
    }
    else
    {
        AcpiOsPrintf ("Could not read table %s from registry\n", TableName);
    }
#endif

    return (AE_OK);
}

static void
acpi_ut_copy_id_string(char *destination, char *source, acpi_size max_length)
{

    /*
     * Workaround for ID strings that have a leading asterisk. This construct
     * is not allowed by the ACPI specification  (ID strings must be
     * alphanumeric), but enough existing machines have this embedded in their
     * ID strings that the following code is useful.
     */
    if (*source == '*') {
        source++;
    }

    /* Do the actual copy */

    ACPI_STRNCPY(destination, source, max_length);
}

static void
AcpiUtCopyIdString (
    char                    *Destination,
    char                    *Source,
    ACPI_SIZE               MaxLength)
{

    /*
     * Workaround for ID strings that have a leading asterisk. This construct
     * is not allowed by the ACPI specification  (ID strings must be
     * alphanumeric), but enough existing machines have this embedded in their
     * ID strings that the following code is useful.
     */
    if (*Source == '*')
    {
        Source++;
    }

    /* Do the actual copy */

    ACPI_STRNCPY (Destination, Source, MaxLength);
}

void
AcpiDbOpenDebugFile (
    char                    *Name)
{

#ifdef ACPI_APPLICATION

    AcpiDbCloseDebugFile ();
    AcpiGbl_DebugFile = fopen (Name, "w+");
    if (!AcpiGbl_DebugFile)
    {
        AcpiOsPrintf ("Could not open debug file %s\n", Name);
        return;
    }

    AcpiOsPrintf ("Debug output file %s opened\n", Name);
    ACPI_STRNCPY (AcpiGbl_DbDebugFilename, Name,
        sizeof (AcpiGbl_DbDebugFilename));
    AcpiGbl_DbOutputToFile = TRUE;

#endif
}

ACPI_STATUS
AeBuildLocalTables (
    UINT32                  TableCount,
    AE_TABLE_DESC           *TableList)
{
    ACPI_PHYSICAL_ADDRESS   DsdtAddress = 0;
    UINT32                  XsdtSize;
    AE_TABLE_DESC           *NextTable;
    UINT32                  NextIndex;
    ACPI_TABLE_FADT         *ExternalFadt = NULL;


    /*
     * Update the table count. For DSDT, it is not put into the XSDT. For
     * FADT, this is already accounted for since we usually install a
     * local FADT.
     */
    NextTable = TableList;
    while (NextTable)
    {
        if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_DSDT) ||
                ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_FADT))
        {
            TableCount--;
        }
        NextTable = NextTable->Next;
    }

    XsdtSize = BASE_XSDT_SIZE + (TableCount * sizeof (UINT64));

    /* Build an XSDT */

    LocalXSDT = AcpiOsAllocate (XsdtSize);
    if (!LocalXSDT)
    {
        return (AE_NO_MEMORY);
    }

    ACPI_MEMSET (LocalXSDT, 0, XsdtSize);
    ACPI_STRNCPY (LocalXSDT->Header.Signature, ACPI_SIG_XSDT, 4);
    LocalXSDT->Header.Length = XsdtSize;
    LocalXSDT->Header.Revision = 1;

    LocalXSDT->TableOffsetEntry[0] = ACPI_PTR_TO_PHYSADDR (&LocalFADT);

    /*
     * Install the user tables. The DSDT must be installed in the FADT.
     * All other tables are installed directly into the XSDT.
     */
    NextIndex = BASE_XSDT_TABLES;
    NextTable = TableList;
    while (NextTable)
    {
        /*
         * Incoming DSDT or FADT are special cases. All other tables are
         * just immediately installed into the XSDT.
         */
        if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_DSDT))
        {
            if (DsdtAddress)
            {
                printf ("Already found a DSDT, only one allowed\n");
                return (AE_ALREADY_EXISTS);
            }

            /* The incoming user table is a DSDT */

            DsdtAddress = ACPI_PTR_TO_PHYSADDR (NextTable->Table);
        }
        else if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_FADT))
        {
            ExternalFadt = ACPI_CAST_PTR (ACPI_TABLE_FADT, NextTable->Table);
            LocalXSDT->TableOffsetEntry[2] = ACPI_PTR_TO_PHYSADDR (NextTable->Table);
        }
        else
        {
            /* Install the table in the XSDT */

            LocalXSDT->TableOffsetEntry[NextIndex] = ACPI_PTR_TO_PHYSADDR (NextTable->Table);
            NextIndex++;
        }

        NextTable = NextTable->Next;
    }

    /* Build an RSDP */

    ACPI_MEMSET (&LocalRSDP, 0, sizeof (ACPI_TABLE_RSDP));
    ACPI_MEMCPY (LocalRSDP.Signature, ACPI_SIG_RSDP, 8);
    ACPI_MEMCPY (LocalRSDP.OemId, "I_TEST", 6);
    LocalRSDP.Revision = 2;
    LocalRSDP.XsdtPhysicalAddress = ACPI_PTR_TO_PHYSADDR (LocalXSDT);
    LocalRSDP.Length = sizeof (ACPI_TABLE_XSDT);

    /* Set checksums for both XSDT and RSDP */

    LocalXSDT->Header.Checksum = (UINT8) -AcpiTbChecksum (
                                     (void *) LocalXSDT, LocalXSDT->Header.Length);
    LocalRSDP.Checksum = (UINT8) -AcpiTbChecksum (
                             (void *) &LocalRSDP, ACPI_RSDP_CHECKSUM_LENGTH);
//.........这里部分代码省略.........

acpi_status
acpi_ex_convert_to_buffer(union acpi_operand_object *obj_desc,
			  union acpi_operand_object **result_desc)
{
	union acpi_operand_object *return_desc;
	u8 *new_buf;

	ACPI_FUNCTION_TRACE_PTR(ex_convert_to_buffer, obj_desc);

	switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
	case ACPI_TYPE_BUFFER:

		/* No conversion necessary */

		*result_desc = obj_desc;
		return_ACPI_STATUS(AE_OK);

	case ACPI_TYPE_INTEGER:

		/*
		 * Create a new Buffer object.
		 * Need enough space for one integer
		 */
		return_desc =
		    acpi_ut_create_buffer_object(acpi_gbl_integer_byte_width);
		if (!return_desc) {
			return_ACPI_STATUS(AE_NO_MEMORY);
		}

		/* Copy the integer to the buffer, LSB first */

		new_buf = return_desc->buffer.pointer;
		ACPI_MEMCPY(new_buf,
			    &obj_desc->integer.value,
			    acpi_gbl_integer_byte_width);
		break;

	case ACPI_TYPE_STRING:

		/*
		 * Create a new Buffer object
		 * Size will be the string length
		 *
		 * NOTE: Add one to the string length to include the null terminator.
		 * The ACPI spec is unclear on this subject, but there is existing
		 * ASL/AML code that depends on the null being transferred to the new
		 * buffer.
		 */
		return_desc = acpi_ut_create_buffer_object((acpi_size)
							   obj_desc->string.
							   length + 1);
		if (!return_desc) {
			return_ACPI_STATUS(AE_NO_MEMORY);
		}

		/* Copy the string to the buffer */

		new_buf = return_desc->buffer.pointer;
		ACPI_STRNCPY((char *)new_buf, (char *)obj_desc->string.pointer,
			     obj_desc->string.length);
		break;

	default:
		return_ACPI_STATUS(AE_TYPE);
	}

	/* Mark buffer initialized */

	return_desc->common.flags |= AOPOBJ_DATA_VALID;
	*result_desc = return_desc;
	return_ACPI_STATUS(AE_OK);
}

static ACPI_STATUS
DtParseLine (
    char                    *LineBuffer,
    UINT32                  Line,
    UINT32                  Offset)
{
    char                    *Start;
    char                    *End;
    char                    *TmpName;
    char                    *TmpValue;
    char                    *Name;
    char                    *Value;
    char                    *Colon;
    UINT32                  Length;
    DT_FIELD                *Field;
    UINT32                  Column;
    UINT32                  NameColumn;
    BOOLEAN                 IsNullString = FALSE;


    if (!LineBuffer)
    {
        return (AE_OK);
    }

    /* All lines after "Raw Table Data" are ingored */

    if (strstr (LineBuffer, ACPI_RAW_TABLE_DATA_HEADER))
    {
        return (AE_NOT_FOUND);
    }

    Colon = strchr (LineBuffer, ':');
    if (!Colon)
    {
        return (AE_OK);
    }

    Start = LineBuffer;
    End = Colon;

    while (Start < Colon)
    {
        if (*Start == ' ')
        {
            Start++;
            continue;
        }

        /* Found left bracket, go to the right bracket */

        if (*Start == '[')
        {
            while (Start < Colon && *Start != ']')
            {
                Start++;
            }

            if (Start == Colon)
            {
                break;
            }

            Start++;
            continue;
        }

        break;
    }

    /*
     * There are two column values. One for the field name,
     * and one for the field value.
     */
    Column = ACPI_PTR_DIFF (Colon, LineBuffer) + 3;
    NameColumn = ACPI_PTR_DIFF (Start, LineBuffer) + 1;

    Length = ACPI_PTR_DIFF (End, Start);

    TmpName = UtLocalCalloc (Length + 1);
    ACPI_STRNCPY (TmpName, Start, Length);
    Name = DtTrim (TmpName);
    ACPI_FREE (TmpName);

    Start = End = (Colon + 1);
    while (*End)
    {
        /* Found left quotation, go to the right quotation and break */

        if (*End == '"')
        {
            End++;

            /* Check for an explicit null string */

            if (*End == '"')
            {
                IsNullString = TRUE;
            }
            while (*End && (*End != '"'))
//.........这里部分代码省略.........

static char *
DtTrim (
    char                    *String)
{
    char                    *Start;
    char                    *End;
    char                    *ReturnString;
    ACPI_SIZE               Length;


    /* Skip lines that start with a space */

    if (!ACPI_STRCMP (String, " "))
    {
        ReturnString = UtLocalCalloc (1);
        return (ReturnString);
    }

    /* Setup pointers to start and end of input string */

    Start = String;
    End = String + ACPI_STRLEN (String) - 1;

    /* Find first non-whitespace character */

    while ((Start <= End) && ((*Start == ' ') || (*Start == '\t')))
    {
        Start++;
    }

    /* Find last non-space character */

    while (End >= Start)
    {
        if (*End == '\r' || *End == '\n')
        {
            End--;
            continue;
        }

        if (*End != ' ')
        {
            break;
        }

        End--;
    }

    /* Remove any quotes around the string */

    if (*Start == '\"')
    {
        Start++;
    }
    if (*End == '\"')
    {
        End--;
    }

    /* Create the trimmed return string */

    Length = ACPI_PTR_DIFF (End, Start) + 1;
    ReturnString = UtLocalCalloc (Length + 1);
    if (ACPI_STRLEN (Start))
    {
        ACPI_STRNCPY (ReturnString, Start, Length);
    }

    ReturnString[Length] = 0;
    return (ReturnString);
}

ACPI_STATUS
AcpiTbFindTable (
    char                    *Signature,
    char                    *OemId,
    char                    *OemTableId,
    UINT32                  *TableIndex)
{
    UINT32                  i;
    ACPI_STATUS             Status;
    ACPI_TABLE_HEADER       Header;


    ACPI_FUNCTION_TRACE (TbFindTable);


    /* Normalize the input strings */

    ACPI_MEMSET (&Header, 0, sizeof (ACPI_TABLE_HEADER));
    ACPI_MOVE_NAME (Header.Signature, Signature);
    ACPI_STRNCPY (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
    ACPI_STRNCPY (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);

    /* Search for the table */

    for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
    {
        if (ACPI_MEMCMP (&(AcpiGbl_RootTableList.Tables[i].Signature),
                            Header.Signature, ACPI_NAME_SIZE))
        {
            /* Not the requested table */

            continue;
        }

        /* Table with matching signature has been found */

        if (!AcpiGbl_RootTableList.Tables[i].Pointer)
        {
            /* Table is not currently mapped, map it */

            Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
            if (ACPI_FAILURE (Status))
            {
                return_ACPI_STATUS (Status);
            }

            if (!AcpiGbl_RootTableList.Tables[i].Pointer)
            {
                continue;
            }
        }

        /* Check for table match on all IDs */

        if (!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
                            Header.Signature, ACPI_NAME_SIZE) &&
            (!OemId[0] ||
             !ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
                             Header.OemId, ACPI_OEM_ID_SIZE)) &&
            (!OemTableId[0] ||
             !ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId,
                             Header.OemTableId, ACPI_OEM_TABLE_ID_SIZE)))
        {
            *TableIndex = i;

            ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
                Header.Signature));
            return_ACPI_STATUS (AE_OK);
        }
    }

    return_ACPI_STATUS (AE_NOT_FOUND);
}

acpi_status
acpi_tb_find_table(char *signature,
		   char *oem_id, char *oem_table_id, u32 *table_index)
{
	u32 i;
	acpi_status status;
	struct acpi_table_header header;

	ACPI_FUNCTION_TRACE(tb_find_table);

	/*                             */

	ACPI_MEMSET(&header, 0, sizeof(struct acpi_table_header));
	ACPI_STRNCPY(header.signature, signature, ACPI_NAME_SIZE);
	ACPI_STRNCPY(header.oem_id, oem_id, ACPI_OEM_ID_SIZE);
	ACPI_STRNCPY(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE);

	/*                      */

	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
		if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature),
				header.signature, ACPI_NAME_SIZE)) {

			/*                         */

			continue;
		}

		/*                                              */

		if (!acpi_gbl_root_table_list.tables[i].pointer) {

			/*                                       */

			status =
			    acpi_tb_verify_table(&acpi_gbl_root_table_list.
						 tables[i]);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}

			if (!acpi_gbl_root_table_list.tables[i].pointer) {
				continue;
			}
		}

		/*                                  */

		if (!ACPI_MEMCMP
		    (acpi_gbl_root_table_list.tables[i].pointer->signature,
		     header.signature, ACPI_NAME_SIZE) && (!oem_id[0]
							   ||
							   !ACPI_MEMCMP
							   (acpi_gbl_root_table_list.
							    tables[i].pointer->
							    oem_id,
							    header.oem_id,
							    ACPI_OEM_ID_SIZE))
		    && (!oem_table_id[0]
			|| !ACPI_MEMCMP(acpi_gbl_root_table_list.tables[i].
					pointer->oem_table_id,
					header.oem_table_id,
					ACPI_OEM_TABLE_ID_SIZE))) {
			*table_index = i;

			ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
					  "Found table [%4.4s]\n",
					  header.signature));
			return_ACPI_STATUS(AE_OK);
		}
	}

	return_ACPI_STATUS(AE_NOT_FOUND);
}